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Pain Modulation and Central Sensitization in Painful Diabetic Peripheral Neuropathy: Updated Narrative Review and
Di Ye1, Timothy J Fairchild2, Lechi Vo1
1School of Psychology and Centre for Healthy Ageing, College of Health and Education, Murdoch University, Murdoch, WA, Australia.
Journal of Diabetes
|April 4, 2026
Summary
Painful diabetic peripheral neuropathy (DPN) involves nerve damage and central sensitization. Emerging evidence suggests metabolic syndrome, like obesity, may impair pain modulation, potentially indicating DPN risk.
Area of Science:
- Neurology
- Endocrinology
- Pain Management
Background:
- Painful diabetic peripheral neuropathy (DPN) stems from sensory neuron damage, causing chronic pain and reduced quality of life.
- Oxidative stress and central sensitization were previously identified as key mechanisms linking hyperglycemia to nerve injury and pain.
Purpose of the Study:
- To synthesize updated evidence on DPN mechanisms, focusing on central nervous system alterations and pain modulation.
- To investigate the role of metabolic syndrome in DPN and its potential impact on pain modulation.
Main Methods:
- Expanded PubMed search terms to include metabolic syndrome and pain modulation.
- Reviewed studies published between September 2021 and February 2026.
Main Results:
- Central nervous system alterations and central sensitization remain prominent features of painful DPN.
- Emerging evidence indicates metabolic syndrome, such as overweight, may impair pain modulation in individuals with or at risk for diabetes.
Conclusions:
- Central sensitization is a key feature of painful DPN.
- Impaired pain modulation due to metabolic syndrome warrants further investigation as an early DPN indicator.
- Understanding these mechanisms may guide the development of novel pain management strategies.
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